Theodore appears like an ordinary human. Depicted in a white lab coat with glasses and dark hair, he is never shown to be greater than those who worship him. His posing is modest, no different than how an ordinary person might be posed in a portrait or statue. Theodore's humble beginnings are represented in every depiction, as is his passion for exploring the unknown. He is rarely without some kind of exploratory tool in hand, whether that be a map, a compass, or a notebook.
Theodore is humble, a man who cares most about both acquiring and protecting knowledge. Uncovering the truth is a driving aspect of him, along with an unquenchable thirst for excitement. He's also extremely intelligent, and was known to be a truly gifted scientist and researcher back when he was mortal. He's an everyman, personable and kind, the sort of person you'd grab a drink with at the bar. Theodore is always shown to be as nearly an equal to his followers, more of a leader than a formal deity even while his powers far surpass that of an ordinary man.
Worshippers of Theodore have many titles, but most commonly are known as Travelers. Their temples and shrines are usually in places that are still wild and unmapped, made to be easily moved elsewhere and join Travelers on their adventures. Worship is typically informal for this reason, and meant to be done in the field. Reverence is given by discovering something new and sharing the joy of adventure with others.
Mapping new places and the search for knowledge about The Sundering are what drive Travelers at their core. They want to follow in Theodore's footsteps and figure out what made the planes shatter, and perhaps venture beyond the scope of this inner section of the Aether.